Lubricating-strip for leaf-springs.



E'. G. DANN.

LUBHICATING STRQP FORVLEAF SPRINGS. APPLlcATloN FILED 1AN2.1914.

1 1 43, 8 1 Patented June l22, 1915.

ERNEST ci. DANN,

0F CHICAGO,

ILLINOIS.

LUBBICATING-STRIP FOB LEAF-SPRINGS.

Speceaton of Letters Patent.

Patented June 22, 1915.

Application tiled Ianuary 2, 1914. Serial No. 819,074.

To all whom t may concern Be it known that I, Ensins'r G. DANN, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented Certain new and useful Improvementsin Lulnicating-Strips for Leaf-Springs, of which the following is aspecification.

My invention relates to a lubricating strip or element adapted primarilyto be placed between the leaves of a compound leaf spring such as theelliptical or semielliptical springs commonly used for supportingvehicle bodies on their running gear. A lubricating strip of this sort,when placed between the leaves of a compound leaf spring, adds to theresiliency of the spring and also to its life by keeping lubricated thecontacting surfaces of the leaves which, of course, have a certainamount of relative movement when the spring is flexed. Such alubricating strip must meet certain requirements before it is possibleto utilize to the best advantage this expedient of interleaving acompound spring with lubricant carrying laminaz. If the perforations orpockets in the lubricating strips or elements are filled at the time thespring is assembled, the operation is tedious and expensive. If, on theother hand, the strips are filled with the lubricant in advance,` thelubricant is apt to drop or work out of the perforations or pockets intransportation or in the operation of assembling, which latternecessarily involves the bending. of the strips, and this is the caseparticularly in warm weather' or when the work is done in a warm room.Furthermore, the filling of the strips at any time, if they are handledas separate articles, is slow, diflicult and costly.

My invention has for its primary object to provide an improvedlubricating element of the general type noted, but constituted so thatit will reliably retain the lubricant in the pockets under all ordinaryconditions and at all ordinary temperatures shall be cleanly to handle,and so that such element, or the strip from which the same is cut, maybe stored, shipped and handled in assembling with the leaves of thespring without danger of injury thereto or deterieration.

The invention has for further objects such other new and improvedconstructions, arrangements, devices and expedients relating tolubricating material suitable for use 1n compound springs or in otheranalogous situations, as will be hereinafter described and claimed.

In the accompanying drawings I have shown* a preferred form oflubricating strip made in accordance with the invention.

In the drawings Figure l is a fragmentary plan v'iew of the lubricatingstrip, successive laminae being broken away to show the structure of thearticle; Fig. 2, a sectional view taken on line 2-2 of Fig. 1; Fig. 3, aview, in perspective, of the lubricatlng element ready to be placedbetween the leaves of a semi-elliptical spring, the upper covering stripbeing broken away in one place; and Fig. 4, a broken view, inperspective, of a spring provided with such lubricetin elements arrangedbetween the leaves t ereof.

Like characters of reference designate like parts in the several figuresof the drawings.

The preferred form of lubricating strip shown comprises a thin strip ofmetal a formed with a plurality of perforations, preferably with acentral row of perforations b and on opposite sides of this several rowsof perforations of smaller diameter designated c. The perforations and care filled with a lubricating substance d. The element comprises furthercovering films or strips e, f, preferably made of paper or other thinmaterial which are caused to adhere to the metal strip, preferablythrough the agency of the lubricant alone. These strips or Vfilms are ofsuch character as to readily disintegrate under the abrasive action 0fthe leaves of the spring. For the lubricant I use some lubricatingsubstance, the melting point of which is relatively high. This substanceis preferably melted by heat and run on to the strip so as to fill theperforations or pockets therein; and the filled carrier strip with itscovering strips e, f is then passed through rolls, or otherwisecompressed so that the paper strips are caused to adhere firmly and withrelative permanency to the metal strip which they cover. A material madeup in this manner is not affected by any ordinarily high temperature, itcan be readily shipped in bulk, for example, in rolls or wound onspools, to the manufacturer of the springs, and it may be cut up, heutor otherwise handled without danger of having the lubricant escape fromthe perforations, either in shipment, storage, or

when it is cut up and assembled in the spring. When placed between theleaves of a spring, as shown in Fig. 4, the paper coverings are quicklydisintegrated by the abrasive action of the springs, and, beingthoroughly saturated With the lubricant, and in fact, uniting with itupon disintegration, they do not diminish or injuriously aifect theintended function of the device.

While 1 have described my invention in a certain preferred embodiment,modifications might be made Without departing from the principle of theinvention. Therefore, I do not Wish to be understood as limiting theinvention to the particular constructions, arrangements, dgvices andexpedients shown and described, except so far as these severalconstructions, arrangements, devices and expedients are specificallymade limitations in the claims herein.

I claim:

1. A lubricating element for a compound spring comprisin a lubricantcarrier formed with pockets, a lu ricating substance in said pockets,and an adherent covering for said pockets.

2. A lubricating element for a compound spring comprising a lubricantcarrier formed with pockets, a lubricating substance in said pockets,and an adherent disintegrable covering for said pockets.

3. A lubricating element for a compound spring comprising a perforatedmetal strip, a lubricating substance in the perforations of said strip,and adherent coverings on opposite sides of said metal strip.

4. A lubricating element for a compound spring comprising a perforatedmetal strip, a lubricating substance in the erforations of said strip,and adherent disintegrable covering strips on opposite sides of saidmetal strip.

5. A lubricating element for a compound spring comprising a perforatedmetal strip, a lubricating substance in the perforations of said strip,and strips of paper on opposite sides of the metal strip which arecaused to adhere thereto by the lubricant.

6. A lubricating element comprising a metallic carrier adapted tocontain a lubrieating substance, a lubricating substance associated withthe carrier, and an adherent covering to hold the lubricating substancein place in the carrier.

7. A lubricating element comprising a metallic carrier adapted tocontain a lubricating substance, a lubricating substance associated withthe carrier, and a disintegrable adherent covering to hold thelubricating substance in place in the carrier.

ERNEST G. DANN. Witnesses:

L. A. FALKENBERG, J. B. LAGonIo.

Copiel of this patent may be obtained for tive cents each, by addressingthe Commissioner of ratents. Washington, D. C.

It is,hereby certified that in Letters Patent No. 1,143,812, grantodJuno 22, 1915, upon the application of Ernest G. Dann, Chicago,Illinois, for an improvement in "Lubricating-Strips for Leaf-Springs,errors appear in the printed specification requiring correction asfollows: Page l, lines 48-49, strike out the words and comma "shall becleanly to handle, and" same page, line 50, before the word "may insertthe Words and coinma shall be clanl'y to handle, and,` and that the saidLetters Patent should be read With these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealedthis 24th day of August, A. D., 1915.

J. T. NEWTON,

Acting Commissioner of Patents.

[SEAL]

